phagocytosis Flashcards
1
Q
what are phagocytes?
A
white blood cells that are produced continuously in the bone marrow
2
Q
what are the two types of phagocytes?
A
- neutrophils
- macrophages
3
Q
what is the role of phagocytes?
A
to recognise and engulf pathogens - this is known as phagocytosis (a n on specific immune response)
4
Q
explain phagocytosis
A
- phagocyte is attracted to pathogen by chemotaxis and changes shape around it
- recognition and attachment
- pathogen is engulfed (its now a phagosome)
- lysosome and phagosome fuse together to form phagolysosome
- hydrolytic enzymes in lysosome act on pathogen and break it down
- pathogen is digested and waste products leave cell via exocytosis (or an APC is produced)
